US2092887A - Impulse operated relay - Google Patents

Impulse operated relay Download PDF

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Publication number
US2092887A
US2092887A US47675A US4767535A US2092887A US 2092887 A US2092887 A US 2092887A US 47675 A US47675 A US 47675A US 4767535 A US4767535 A US 4767535A US 2092887 A US2092887 A US 2092887A
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United States
Prior art keywords
discharge
tube
circuit
grid
impulse
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Expired - Lifetime
Application number
US47675A
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English (en)
Inventor
David G C Luck
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RCA Corp
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RCA Corp
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Publication date
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Priority to US47675A priority Critical patent/US2092887A/en
Priority to AT151605D priority patent/AT151605B/de
Application granted granted Critical
Publication of US2092887A publication Critical patent/US2092887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K25/00—Pulse counters with step-by-step integration and static storage; Analogous frequency dividers

Definitions

  • My invention relates to impulse operated re. lays. Speciiically, my invention is a gastube relay and circuit therefor for alternately starting and stopping current ow by, or for indicat- 5 ing every nth one of, a series of voltage pulses.
  • One of the objects oi my invention is to generate a series of duration-modulated dots or dashes of current which are started and stopped by a series of variably timed identical voltage impulses.
  • Another object of my invention is to devise means for indicating every nth impulse of a series of voltage impulses.
  • Fig. III is a circuit diagram of an embodiment of my invention which may be used to indicate every nth impulse of a series of voltage impulses
  • Fig. IV is an illustration of the plate voltage and plate current characteristics Aof one oi.' the tubes used in Fig. III.
  • a pair of terminals I, 3, represent the input to the network.
  • lOne of these terminals I 45 is serially connected through a capacitor 5 to the grid-electrode I of a gasfllled relay tube 9.
  • 'I'his tube may be an RCA type 885, or the like.
  • the lament of cathode II is heated by-a suitable source of current.
  • the heating battery - is 5'0 omitted for simplicity.
  • the cathode II is connected to the remaining input terminal 3 lthrough a self-biasing and protective resistor I3.
  • a biasing battery I 4 may be used in addition to the self bias.
  • the grid 1 is connected through 55 the biasing battery I4 tothe input terminal 3 by vthis region, one impulse may be applied to the the anode resistor 2I.-
  • the plate I1 is connected. through a capacitor I9 to the lower terminal of ⁇ the bias resistor I3.
  • 'I'he plate is also connected through an adjustable resistor 2
  • 'Ihe negative ter- 5 minal of lthe B battery is connected to the lower terminal of the, bias resistor I3.
  • the output from the iirst tube 9 is taken across the bias resistor I3, which is connected toJ a second tube 25.
  • This second tube mayTb any con- 10 ventional tube, such as an RCA 56.
  • e cathode 2l of the second tube is heated by a-battery, or :the like.
  • This cathode 21 is connected to the cathode II of the rst tube.
  • the grid 2,9 is connected through a biasing battery 30 to the nega- 15 tive terminal of the B battery 23.
  • is connected through a resistor 33 tothe positive terminal of the B battery.V
  • the plate is also connected through a capacitor.35' to one of a pair of output terminals 31-39.1
  • the other out- 20 put terminal 39 is connected to the negative terminal of the B battery.
  • the operation of this circuit may be described as follows: If 'a series of voltage impulses are applied to the input circuit oi a gas tube. the tube may operate with a steady discharge, or an oscillatory discharge of a sawtooth pattern occurring at impulse frequency or a sub-multiple thereof.
  • By suitable adjustments of the bias resistor, the plate voltage, and the variable capacitor,- I have discovered a narrow regionv of unusual operating characteristics located between the continuous discharge and the oscillatory condition at impulse frequency.
  • the low current discharge is represented by the horizontal portions of the graph N of Figure IIe.
  • the saw-tooth wave form of Fig. IIb may be regulated by adjusting the resistance and capacitance of the plate circuit.
  • the most convenient method for adjusting the circuit constants. is to connect a cathode ray oscillograph across the bias or protective resistor I3. The constants of the circuit are then varied until the proper wave form appears in the oscillograph. 'Ifhe adjustment may likewise be made by connecting the oscillograph to the output terminals 31-39 of the network.
  • Other critical operating conditions also exist between the various regions of normal operation but use has been found only for the one described.
  • circuits of this type may be operated by impulses at a 'rate of about 20,000 per second.
  • the resistor I3 should have a resistance not greater than a value ten times the value normally required to protect the tube 9 against excessive current surges.- 'Ihe adjustment of the circuit constants is somewhat critical but the operation remains stable after the required adjustment has been made.
  • the average impulse rate is preferably fairly constant.
  • the individual impulses may have intervals giving 95% off time to95% 'on time of the trickle discharge.
  • FIG. III A suitable arrangement is shown in Fig. III.
  • One of a pair of input terminals 4I, 43 is connected through a blocking capacitor 44 to the grid electrode 45 of a gas tube relay 41, of the RCA type 885, or the like.
  • The: grid 45 is connected through a gri'dresistor46 and biasing battery 48 to the other input terminal 43.
  • the cathode 49 of this tube is connected through a protective resistor 5I to the lower of the two input terminals.
  • the plate 53 is connected to the positive terminal of a B battery 45 through an adjustable resistor 51.
  • the plate 53 is also connected through a capacitor 59 to the negative terminal of the -B battery 55.
  • the B battery is connected to the lower terminal of the-protective resistor 5I.
  • a second tube 6 I preferably ⁇ similar to the rst tube, is connected in a similar circuit arrangement.
  • the input of the second tube is connected to the protective resistor 5I of the first tube 41.
  • a thirdtube 63 also by preference, similar to the first tube, is similarly connected across the protective resistor of the second tube.
  • a pair of output terminals 65-61 are connected respectively to the cathode 69 and lower terminals of.
  • Biasing batteries 13 may be employed.
  • the submultiple frequency in the output may be of the order of Vgth of the input frequency. While three stages are shown in Fig. III, one or more stages may be used.
  • the time constant of the capacitance and resistance of the plate circuit is adjusted to approximately ten times,-by way of example, that of the period of the input voltage, Fig. IVe.
  • the plate voltage will vary in a saw-tooth pattern as shown in Fig. IVf.
  • the voltage changes will correspond to plate current changes across the protective resistor similar to the impulses shown in Fig. IVg.
  • the second tube also reduces the rate of the impulses by picking out, for example, every th impulse by a. properly adjusted time constant plate circuit.
  • the output of the second tube includes impulses at the rate of loth of the input to this found that the circuits described may be used as frequency dividers for ratio as high as 20 to 1 if the input voltage is a sharp uniform pulse.
  • Frequency division of the type described is very useful Afor obtaining uniform low frequencyimpulses from a constant high frequency source.
  • a constant 120 kilocycle source may be lstepped down to' 120 cycles for comparison with clocks, watches and the like.
  • the system of Fig. I may be ein loyed, for example, to reproduce a telegraphic t nsmission, of a suitable type, from a series of i ulses marking the beginnings and endings of the telegraphic signals.
  • a relay tube havi g grid, cathode, and plate electrodes, means r impressing input signals on said grid, a disch rge circuit associated with said cathode and pl te electrodes, a protective resistance serially nnected in said discharge circuit, and means for adjusting said circuit between the limits c! a steady discharge and an oscillatory discharge -within. 'which limits one input impulse impressed on vsaid grid starts a now of discharge current-which is not completely extinguished until the next input impulse cuts 'oil said 2.
  • a gaseous relay tube having grid, cathode, and plate electrodes, means for impressing input signals between said grid and cathode electrodes, a discharge circuit associated with said cathode and plate electrodes, a protective resistance joined to said cathode and serially connected in said discharge circuit, and means for adjusting said circuit within a region bounded by a steady disl. charge and an oscillatory discharge within which region one input impulse impressed on said grid starts a ow of discharge current'which is not completely extinguished until the next input impulse cuts off said discharge.
  • a relay tube having grid, cathode. and plate electrodes, means for impressing input signals on said grid.
  • a discharge circuit associated with said cathode and plate electrodes, a protective resistance serially connected in said discharge circuit, means for adjusting said circuit withina narrow region between a steady discharge and an oscillatory discharge within which region onev input impulse impressed on said grid starts a flow of discharge current which is not completely extinguished until thenext input impulse cuts oi said discharge, and means for impressing output voltages derived across said protective resist-'- including a subsequent electriccharge ofthe same sign as said first electric charge impressed on said grid for extinguishing said discharge current.
  • a gas tube relay having grid. cathode and plate electrodes, a protective resistance, an input circuit including said grid and cathode, an
  • a relay tube having grid, cathode,l and plate elec-y trodes, means for impressing input signals on said grid, a discharge, circuit associated with said cathode and plate electrodes, a protective resistance serially connected in said discharge circuit, a source of current -for said discharge circuit, and means for adjusting said circuit within a narrow region limited by a steady discharge and an oscillatory discharge, and within which region one input impulse impressed on said grid starts a ow of discharge vcurrent whichis not completely extinguished until the next input impulse cuts oil said discharge.
  • a relay tube having grid, cathode, and plate velectrodes, means for impressing input ⁇ signals on said grid, a discharge circuit associated. with said cathode and plate electrodes, a protective resistance serially connected in-said discharge circuit, a source of current for said discharge cin'- cuit the negative terminal of said source being connected to said protective resistance, and means for adjusting said circuit within a region bounded by a steady discharge and an oscillatory. discharge at which adjustment one input impulse impressed on said grid starts a ow of discharge current which is not completely extinguished until the next input impulse cuts oiI said discharge.

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US47675A 1935-10-31 1935-10-31 Impulse operated relay Expired - Lifetime US2092887A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US47675A US2092887A (en) 1935-10-31 1935-10-31 Impulse operated relay
AT151605D AT151605B (de) 1935-10-31 1936-10-28 Schaltung zum Trennen von Bildströmen von Synchronisierimpulsen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47675A US2092887A (en) 1935-10-31 1935-10-31 Impulse operated relay

Publications (1)

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US2092887A true US2092887A (en) 1937-09-14

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AT (1) AT151605B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422204A (en) * 1943-06-22 1947-06-17 Bell Telephone Labor Inc Range indicator
US2425165A (en) * 1943-05-15 1947-08-05 Rca Corp Stabilized harmonic oscillator
US2434894A (en) * 1941-09-26 1948-01-27 Standard Telephones Cables Ltd Apparatus for converting pairs of time modulated pulses into pulses of variable duration
US2457819A (en) * 1946-11-14 1949-01-04 Conrad H Hoeppner Signal generation system
US2495753A (en) * 1943-04-12 1950-01-31 Sperry Corp Ground target elimination
US2552527A (en) * 1945-03-28 1951-05-15 Sperry Corp Automatic gain-control system for radar direction indicators
US2604516A (en) * 1946-10-17 1952-07-22 Bendix Aviat Corp Electrical circuit analyzing apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434894A (en) * 1941-09-26 1948-01-27 Standard Telephones Cables Ltd Apparatus for converting pairs of time modulated pulses into pulses of variable duration
US2495753A (en) * 1943-04-12 1950-01-31 Sperry Corp Ground target elimination
US2425165A (en) * 1943-05-15 1947-08-05 Rca Corp Stabilized harmonic oscillator
US2422204A (en) * 1943-06-22 1947-06-17 Bell Telephone Labor Inc Range indicator
US2552527A (en) * 1945-03-28 1951-05-15 Sperry Corp Automatic gain-control system for radar direction indicators
US2604516A (en) * 1946-10-17 1952-07-22 Bendix Aviat Corp Electrical circuit analyzing apparatus
US2457819A (en) * 1946-11-14 1949-01-04 Conrad H Hoeppner Signal generation system

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Publication number Publication date
AT151605B (de) 1937-11-25

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